New VOC+NOx Sensor from Sensirion detects various Indoor Gas Pollutants on a Single Chip

Published  December 16, 2021   0
L Lakshita
 Sensirion VOC NOx Sensor SGP41

Sensirion has launched the new SGP41 VOC+NOx sensor that is designed as a digital smart switch and regulation unit for indoor air quality applications. This sensor offers a solution for two complete sensors on a single chip, facilitating design-in and cutting design costs, and is suitable for air treatment devices such as air purifiers.

Based on Sensirion’s proven MOXSens Technology, this sensor’s unmatched robustness against contamination by siloxanes results in long-term stability, in terms of sensitivity, and response time. Moreover, the two sensor signals processed by Sensirion’s powerful Gas Index Algorithm can be used directly to automatically trigger the removal of indoor air gas pollutants by air treatment devices without the need for user-device interaction. 

Key Features

  • MOx based gas sensor for air quality applications
  • Outstanding long-term stability and lifetime
  • I2C interface with digital output signals
  • Very small 6-pin DFN package: 2.44 x 2.44 x 0.85 mm3
  • Low power consumption: 3.2 mA at 3.3 V

This sensor solution is well-suited to the constant monitoring of VOC and NOx levels, including potentially harmful events that are imperceptible to humans. Furthermore, automatic control of air treatment devices based on the SGP41’s signals helps to save energy by turning them off once the VOC and/or NOx events have been taken care of.


Both SGP41 and the evaluation kit are now available worldwide through Sensirion’s distribution network.